One-piece face mask



FIG. 1 is a perspective front view of a one-piece face mask showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational plan view thereof;

FIG. 4 is a left elevational plan view thereof;

FIG. 5 is a right elevational plan view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a one-piece face mask, as shown and described. 